scholarly journals A predictive model of “favorable” and “unfavorable” anteroposterior skeletal relations among Class Is and Class IIs

2021 ◽  
Author(s):  
Jacob S. Bleyer ◽  
Larry Tadlock ◽  
Matthew Kesterke ◽  
Peter H. Buschang
Keyword(s):  
Longitudinal Study ◽  
Predictive Model ◽  
Multiple Regression ◽  
Discriminant Function ◽  
Growth Potential ◽  
Valid Measure ◽  
Discriminant Analyses

ABSTRACT Objectives To validate the use of the sagittal distance between ANS and Pg (ANSPg) as a measure of favorable and unfavorable anteroposterior skeletal relations and to identify multivariate cephalometric measures that could be used to predict favorable and unfavorable relations at 15 years of age. Materials and Methods This longitudinal study included 226 untreated adolescents evaluated at 10 and 15 years of age. Patients were grouped as “favorable” or “unfavorable” based on the ANSPg (measured parallel to S-N -7°) at 15 years of age (ANSPg15). ANSPg15 was validated based on its correlation with changes in ANSPg between 10 and 15 years of age, as well as its relationships with established measures of growth potential. Multiple regression and discriminant analyses were performed to predict ANSPg15 from measures at 10 years of age. Results ANSPg15 and the change in ANSPg between 10 and 15 years of age were significantly correlated (R= –0.661; P ≤ .001), with 77% of patients in whom relationships improved (ie, distance decreased) exhibiting favorable relationships at 15 years of age. Established measures of growth potential were significantly (P < .001) correlated with ANSPg15 and showed significant differences between patients with favorable and unfavorable relations. Multiple regression showed that the Y-axis, ANS-N-Pg, and symphyseal angle measured at 10 years explained approximately 60% (R = 0.78) of the variation in ANSPg15. Based on these three variables, discriminant function correctly predicted favorable or unfavorable relations of ANSPg15 77% of the time. Conclusions ANSPg15 was a valid measure for determining favorable and unfavorable anteroposterior skeletal relationships that could be predicted with moderately high levels of accuracy.

ENTREPRENEURIAL ORIENTATION AND GROWTH POTENTIAL OF MICROENTERPRISES IN NORTHWEST, NIGERIA

2019 ◽  
Vol 24 (02) ◽  
pp. 1950011
Author(s):  
ABUBAKAR S. GARBA ◽  
IBRAHIM KABIR ◽  
MAHMOUD A. MAHMOUD
Keyword(s):  
Multivariate Analysis ◽  
Multiple Regression ◽  
Analysis Of Variance ◽  
Entrepreneurial Orientation ◽  
Growth Potential ◽  
Multivariate Analysis Of Variance ◽  
Dependent Variables ◽  
The Mean ◽  
Mean Differences

The purpose of this study is to explore the entrepreneurial orientation (EO) and growth potential of microenterprises. To test the research hypotheses, multiple regression and multivariate analysis of variance (MANOVA) were used. Multiple regression was used in explaining how well EO predicts microenterprises growth potential. MANOVA compares the groups and indicates whether the mean differences between the groups on the combination of dependent variables are likely to have occurred by chance. Our study contributes to the literature by exploring the growth potential of the existing microenterprises and explains its relationship to owners’ EO in both urban and rural informal sectors.

scholarly journals Predictive Model for Secundum Atrial Septal Defect Closure with Pulmonary Artery Hypertension in Adult: When to Close

2018 ◽  
Vol 21 (2) ◽  
pp. 108
Author(s):  
Supomo Supomo ◽  
Adika Zhulhi Arjana ◽  
Handy Darmawan
Keyword(s):  
Pulmonary Artery ◽  
Atrial Septal Defect ◽  
Predictive Model ◽  
Multiple Regression ◽  
Septal Defect ◽  
Pulmonary Artery Hypertension ◽  
Defect Closure ◽  
Secundum Atrial Septal Defect ◽  
Atrial Septal Defect Closure ◽  
Significant Difference

Background: Secundum atrial septal defect (SASD) closure is contraindicated in the presence of severe pulmonary artery hypertension (PAH). However, there is no consensus on the threshold of severe PAH, in terms of mean pulmonary artery pressure (mPAP), which would contraindicate for defect closure surgery in adults. Furthermore, PAH can persist, or even increase in severity, after the closure. The aim of this study was to produce a predictive model correlating mPAP in adult SASD patients with PAH after defect closure surgery. Methods: Between January 2014 and March 2017, 29 consecutive adult SASD patients who had PAH and underwent defect closure surgery were included in the study. Age, right atrium (RA) dimension, right ventricle (RV) dimension, and mPAP before surgery were analyzed using multiple regression to produce the model.Results: Multiple regression produced the following model: mPAP prediction = (0.24)(Age) + (0.06)(mPAP before surgery) + (0.17)(RA dimension) + (0.47)(RV dimension) – 13.79 (P = .0008). The mPAP prediction was compared to mPAP of the patients six to nine months after surgery, and showed no significant difference (P = .9562). Conclusion: In adult SASD patients with PAH, our model can significantly predict the mPAP after the closure. If the predicted mPAP is within its normal range, the closure is indicated.

Consistency in the pattern of change in mothers' speech: some discriminant analyses

1980 ◽  
Vol 7 (3) ◽  
pp. 469-487 ◽  
Author(s):  
David Bellinger
Keyword(s):  
Discriminant Function ◽  
Discourse Structure ◽  
Discriminant Analyses ◽  
Maternal Speech ◽  
Discriminant Function Analyses

ABSTRACTThis study demonstrates a striking absence of variability in the speech which mothers address to children of the same age within the 1- to 5-year range. Speech to children of 1; 0, 1; 8, 2; 3 and 5; 0 years was analysed for aspects of syntactic, semantic, pragmatic and discourse structure. Discriminant function analyses showed that the age of the child to whom a mother was speaking could be predicted very accurately from her speech. The rate at which mothers' speech changed was greatest when the children were 1; 8–2; 3, and least when they were 2; 3–5; 0. These trends in the evolution of the maternal speech register are interpreted as responses to concurrent changes in children's language behaviour.

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